TileMap navigation rectangle vs navigation polygon

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:bust_in_silhouette: Asked By klgreg

Hi.
If i use the navigation rectangle (polygon all over tile) for all tiles with navigation in the tile set, the get_simple_path function works successfully. But if i use the navigation polygon with all snap for tile, the get_simple_path function doesn’t work.

The gaps between the tiles? But why does the navigation rectangle work?
polygon

rectangle